Alvarez bubble chamber research,Radiation Laboratory of the University of California,Berkeley,USA,July 1959. From left,US engineers and physicists Paul Hernandez (1918-2009),Edwin McMillan (1907-1991),Luis Walter Alvarez (1911-1988),and (James) Donald Gow. Behind them is the 72-inch bubble chamber,completed in March 1959 after four years of construction led by Hernandez and Gow and supervised by Alvarez (Physics Nobel,1968). McMillan (Chemistry Nobel,1951) was director of the Radiation Laboratory from 1958. The bubble chamber contained liquid hydrogen,used to detect high-energy fundamental particles |